For comparability of different flood events, it is essential to capture
the complete sediment erosion that lies above the measuring
point during the flood. The beginning of erosion of soil and sediments
is discharge dependent and site specific. At river-km
318.1, the critical erosion threshold starts at about 800 m3/s discharge.
It was empirically derived for this sampling site by evaluating
data of former flood investigations (Spott and Guhr, 1996;
Baborowski et al., 2004).